学步园

修改后脚本：http://blog.csdn.net/u010841622/article/details/41857121

using UnityEngine;

public class MouseFollowRotation : MonoBehaviour {

	public Transform target;			
	public float xSpeed=200, ySpeed=200, mSpeed=10;
	public float yMinLimit=0, yMaxLimit=0;
	public float distance=0.35f, minDistance=0.35f, maxDistance=0.35f;
	
	//bool needDamping = false;
	public bool needDamping =true; 
	float damping = 3.0f;
	
	public float x = 0.0f;
	public float y = 0.0f;

	public int leftMax = 95;
	public int rightMax = 265;
	
	
	public void SetTarget( GameObject go )
	
	
	{
		target = go.transform;
	}
	// Use this for initialization
	void Start () {
		Vector3 angles = transform.eulerAngles;
    	x = angles.y;
    	y = angles.x;
	}
	
	// Update is called once per frame
	void LateUpdate () 
	{
		
	
	    if (target) 
	    {
    	//use the light button of mouse to rotate the camera
    		if( Input.GetMouseButton(1) )
    		{
				if (x >= leftMax && x <= rightMax) {
					x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
					y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
				} else {
					if (x < leftMax)
						x = leftMax;
					else if (x > rightMax)
						x = rightMax;
				}

				//x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
				//y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
        		
    			
 				y = ClampAngle(y, yMinLimit, yMaxLimit);
 				
 				//print(Input.GetAxis("Mouse X"));
 				//print( Input.GetAxis("Mouse Y"));
 				print("x : " + x);
				print("y : " + y);

    	      

    		} 

       				
 			distance -= Input.GetAxis("Mouse ScrollWheel")*mSpeed;
    		distance = Mathf.Clamp(distance, 0.35f, 0.35f);
    		  	
        	
        	Quaternion rotation = Quaternion.Euler(y, x, 0.0f);
        	Vector3 disVector = new Vector3( 0.0f, 0.0f, -distance );
        	Vector3 position = rotation * disVector + target.position;
        	//adjust the camera
	    	if( needDamping )
 	    	{
 	    	 	transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.deltaTime*damping);
  	     	 	transform.position = Vector3.Lerp(transform.position, position, Time.deltaTime*damping);
        	}
        	else
        	{
        		transform.rotation = rotation;
        		transform.position = position;
        	}
        	
           	
	    }
	}
	
	static float ClampAngle (float angle, float min, float max) 
	{
	if (angle < -90)
		angle += 90;
	if (angle > 45)
		angle -= 45;
	return Mathf.Clamp (angle, min, max);
	}
}

上面的代码被改的有些乱，重新整理了下：

using UnityEngine;
using System.Collections;

public class MouseFollowRotation : MonoBehaviour {

	public Transform target;
	//调整 速度
	public float xSpeed = 50f, ySpeed = 50f, mSpeed = 10f;
	//调整 转动角度
	public float x = 0.0f, xMinLimit = 0f, xMaxLimit = 360f;
	//调整 高度
	public float y = 0.0f, yMinLimit = 0f, yMaxLimit = 0f;
	//调整 距离
	public float distance = 0.3f, minDistance = 0.3f, maxDistance = 0.3f;

	public bool needDamping = true;
	float damping = 3.0f;//设置 阻尼

	public void SetTarget( GameObject go ) {
		target = go.transform;
	}

	// Use this for initialization
	void Start () {
		Vector3 angles = transform.eulerAngles;
    	x = angles.y;
    	y = angles.x;
	}
	
	// Update is called once per frame
	void LateUpdate () {
	    if (target) {
    		//当按下了鼠标右键
    		if (Input.GetMouseButton(1)) {
				x += Input.GetAxis("Mouse X") * xSpeed * 0.02f;
				y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;

				x = ClampX(x, xMinLimit, xMaxLimit);
				y = ClampAngle(y, yMinLimit, yMaxLimit);
    		}

 			distance -= Input.GetAxis("Mouse ScrollWheel") * mSpeed;
			distance = Mathf.Clamp(distance, minDistance, maxDistance);
			//Camera.main.fieldOfView = distance;//设置主摄像机的y
        	
        	Quaternion rotation = Quaternion.Euler(y, x, 0.0f);
        	Vector3 disVector = new Vector3( 0.0f, 0.0f, -distance );
        	Vector3 position = rotation * disVector + target.position;
        	//adjust the camera
	    	if (needDamping) {
 	    	 	transform.rotation = Quaternion.Lerp(transform.rotation, rotation, Time.deltaTime * damping);
  	     	 	transform.position = Vector3.Lerp(transform.position, position, Time.deltaTime * damping);
        	}
        	else {
        		transform.rotation = rotation;
        		transform.position = position;
        	}
	    }
	}

	static float ClampAngle (float angle, float min, float max) {
		if (angle < -90)
			angle += 90;
		if (angle > 45)
			angle -= 45;
		return Mathf.Clamp (angle, min, max);
	}
	static float ClampX (float x, float min, float max) {
		if (x < 0)
			x = 360;
		if (x > 360)
			x = 0;
		return Mathf.Clamp (x, min, max);
	}
}